In a study of twins reared apart in the 1980s and 1990s, a sample of identical twins who were raised in separated environments produced scores on three measures of intelligence that were as similar to each other as a sample of twins who were raised together. though the sample sizes were relatively small, this research has been repeated with approximately the same findings. we can have some confidence that these findings are valid because of the critical thinking principle of

replicability                    

Explanation:

Replicability: The term replicability refers to the act of repeating a particular study or research without the involvement of the original researcher and original data but mostly using a similar method. It also states that a similar study must produce the same result irrespective of the researcher doing it.

In the question above, since the research has been repeated with the same sample, then these findings are valid because of the critical thinking principle of replicability.

no

explanation:

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.